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Opt Lett. 2011 Jul 1;36(13):2584-6. doi: 10.1364/OL.36.002584.

Three-field noise correlation via third-order nonlinear optical processes.

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  • 1Department of Physics, University of Arkansas, Fayetteville, Arkansas 72701, USA.


We report experimental observation of three-field noise correlation between two coexisting four-wave mixing (FWM) signals and the probe signal in a coherently-prepared rubidium vapor system. The two FWM signals in a double-Λ type quasi-four-level atomic system are obtained in different directions via their respective phase-matching conditions and can be detected individually. These signals and the probe beam are found to be strongly correlated or anticorrelated with each other.

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